Tool



A.' M. PARVIN TOOL arch 1U, 1936.

' Filed April 24, 1934 Patented Mar. 10, 1936 UNITED STATES PATENTOFFICE 'rooL Application April 24, 1934, Serial No. 722,133

3 Claims.

f The present invention relates to a tool for facilitating theassembling or disassembling of work pieces which are removably securedtogether. More particularly, the present invention relates 5 to acombined vise and wrench for use in assembling and disassembling theparts of a nozzle assembly. In the construction of oil burners having anoil discharge gun assembly, it is common to employ a discharge nozzle inwhich an inner nozzle is secured by means of a threaded nipple. Thenipple is generally made of brass and is slotted at one end for thereception of the end of a screw driver to facilitate the insertion orremoval of the nipple. The discharge nozzle and the nipple, when sentout from the factory and when in use, are very tightly threadedtogether. During the use of such nozzle assemblies it not infrequentlyhappens that dirt becomes lodged therein or the parts become gumrned upor corroded or the discharge orice becomes clogged. This necessitatesdisassembling so that the parts may be cleaned or worn parts replaced.

As these repairs are generally made in the 251 place where the burner isused, certain difficulties arise which it is the aim of the presentinvention to obviate. ly small, frequently being less than an inch indiameter. In addition, they are covered with oil repairs, it has beenthe custom for the workman either to grip the assembly in one hand sothat the nipple may be unthreaded or rethreaded with a screw driver heldin the other hand, or to clamp the assembly in a Stillson wrench beforeusing a screw driver on the nipple. The tightness of the nipple requiresthat the workman exert considerable pressure with the screw driver. As aconsequence, when the nozzle is held in the hand, the oiliness of thework and its small size present the constant danger that the screwdriver will slip olf and gouge the workmans hand. Clampingthe nozzle ina Stillson wrench gives rise to the possibility that if the screw driverslips off, the workman may scrape his knuckles on the wrench, and inaddition, the wrench tends to chew the surfaces of they nozzle, therebyrendering its remounting in the burner impracticable. Moreover, sincethe nipple is generally made of .D brass and is therefore soft,` thereis always the danger, regardless of how the nozzle is held, that thescrew driver willrstrip the keyway and thus make removal of the nippleimpracticable.

It is the principal object of the present invention to provide anassembling and disassembling tool in the use of `which there is nodanger of physical injury to the user or damage to the work itself.

To they accomplishment of this object and of 60 such others as mayhereinafter appear, the vari- These nozzle assemblies are general-` andhence are slippery. Heretofore in making.

(c1. sp1- 3) cus features of the present invention reside in certaindevices, combinations, and arrangements of parts fully set forthhereinafter and then pointed out in the appended claims, possessingadvantages which will be readily apparent to those skilled in the art.

The various features of the present invention will be readily understoodfrom an inspection of the accompanying drawing, illustrating the bestform of the invention at present known to the inventor, in which Figure1 is a view in side elevation with the upper arm slightly raised to showthe abutment shoulder;

Fig. 2 is an enlarged detail view in sectional elevation taken along theline 2--2 of. Fig. 1, but with the screw driver end being. shown in thekeyway of the nipple; and

` Fig. 3 is a view in plan of the nozzle assembly and of the socket endof the arm.

The illustrated embodiment of the present invention comprises,fundamentally, a tongs, one arm of which is enlarged at its free end asindicated in Fig. 3 and is provided with a jaw comprising a socket 6.The bottom of this socket is provided with an annular opening 1 smallerin diameter than the socket so as to provide an annular supportingshoulder B. The opposite end of the arm 5 is provided with an integralupstanding lug 9 to the top portion IIl of which the yoked end II of asecond arm I2 is pivoted by means of a pin I3. The free end of thesecond .arm I2 is provided with an opening I4, axially at right anglesto the arm, and the arm itself is substantially as long as the arm ElYso that the arm I2 may be swung to position the opening I4 over thesocket 6, as indicated in Figs. 1 and 2.

Threaded into the opening I4 is a spindle I5, the lower end I5 of whichis a jaw wrench comprising the wedge-shaped end of a screw driver. Theopposite end I'I of the spindle is provided with an opening I8 in whichis secured one end of a lever rod I9.

As shown in Fig. 1 the lug 9 is provided with a shoulder extendingforwardly from the base of the top portion Ill. This shoulder forms anabutment for the arm I2 adjacent the yoked end II and limits themovement of the .arms 5 and I2 toward each other to a position in whichthey are substantially parallel.

The socket 6, lshown for the purpose of disclosure only as beinghexahedral, is adapted to receive and support against rotation adischarge nozzle 2I, such as that of an oil burner gun assembly, of wellknown construction, comprising a dome-shaped surface 22 provided with adischarge orifice 23, a hexahedral nut portion 24, and an externallythreaded end portion 25 by which the nozzle is mounted in the burnerassembly (not shown).

The discharge nozzle 2I carries an inner nozzle 26 provided with a nose21 adapted to abut the inner surface of the dome 22. To hold the innernozzle securely in place a brass nipple 28 is threaded into thedischarge nozzle in tight engagement with an annular shoulder 29 formedy as limiting the various features of the present inon the inner nozzle26. To facilitate the threading of the nipple 28 into and out ofengagement with the inner nozzle 26, the nipple is provided with akeyway 30, comprising diametrically opposed slots, adapted to receivethe end of a screw driver. The inlet end 3| of the inner nozzle 26 mayalso be provided with a similar keyway 32.

When it is desired for any reason to take the nozzle assembly apart, theassembly is removed from the burner and is placed in the socket 6 withthe dome 22 resting on the rim of the annular supporting shoulder 8 asindicated in Figs. 1 and 2. The arm I2 is swung into abutment with theshoulder 2U on the lug 9 to make the arms 5 and I2 substantiallyparallel, the spindle I5 being rst rotated, if necessary, to cause thescrew driver end I6 to enter the keyway 30. The workman then grips thearms 5 and I2 tightly. It will be seen that in this manner the nozzleassembly is held firmly as in a vise, being gripped between two paralleljaws, one of which comprises the socket 6 which supports and receivesthe nozzle assembly, and the other jaw comprising the screw driver endI6 which enters the keyway 36. 'Ihe discharge orifice 23 is exposed byreason of the opening 'I and thus is protected from harm while theassembly is gripped.

To loosen the nipple 28 the workman, while rm'ly gripping the arms 5 andI2, has merely to swing the lever rod I9 counter-clockwise, therebyturning the nipple 28 in the discharge nozzle 2| The spindle I5 merelyrises in the arm I2 as the nipple is turned, the arms 5 and I2 remainingsubstantially parallel, and when the nipple has been thus turned severalrevolutions, it may be unthreaded by hand. A reversal of this operation,of course, effects a threading of the nipple into the nozzle 2I in tightengagement with the shoulder 29 on the inner nozzle 26.

As shown in Fig. 1, the width of the screw driver end I6 is slightlyless than the diameter of the nipple 28. With this construction there iseliminated any chance of the screw driver end engaging the internalthreads of the discharge nozzle 2I with resultant injury. It will beapparent, viewing Fig. 2, that the spindle I5 may be easily threadeddownwardly to cause the screw driver end I6 to enter the keyway 32 ofthe inner nozzle 26. This is of practical importance if the inner nozzleis stuck in the discharge nozzle and can not be shaken out without beingfirst turned to loosen it.

It will be seen that the present invention provides a small, compact,and easily handled tongs which comprises a lever of the third classoperating as a combined vise and wrench. The arms 5 and I 2 may be heldtightly by one hand thereby serving to grip the nozzle assembly as in avise, and since the screw driver end I6 is, in effect, not only a wrenchbut also one jaw of this vise, it follows that with one hand the workmanperforms the two functions of gripping the assembly and of maintainingthe screw driver end I6 in the keyway 30. The workman thus uses hisother hand merely to turn the screw driver end I6. With this mode ofoperation it is impossible for the screw driver end I6 to slip off withinjury to the workman, the discharge nozzle is not chewed, and there iseliminated any of the danger of stripping the keyway 30 which frequentlyoccurs when a workman must turn a screw driver and also exert pressurewith the same hand to hold the end of the screw driver in the keyway.

Nothing herein explained is to be interpreted vention in the scope ofits application to use in connection with the particular type of workoperated upon or the particular device or the particular mode ofoperation thereof 0r all three selected for purposes of illustration andexplanation. Various changesv may be made in the particulars ofstructure disclosed and in the mode of operation thereof, withoutdeparting from the true scope of the actual invention, characterizingfeatures of which are set forth in the following claims.

What is claimed as new, is:

1. A tool comprising a pair of arms, means for pivotall-y relating anend of one of the arms to an end of the other arm so that said arm endsare spaced apart, an abutment carried by one of the arms and engageablewith the other art to milit they movement of the arms towards each otherto a position in which the free ends of the arms are substantiallyparallel, a pair of coacting jaws carried by said free arm ends,respectively, for gripping the work between them as the operative gripsthe arms to hold the abutment and said other arm engaged, the axes ofsaid jaws being normal to said free arm ends, respectively, and meansfor rotating the jaws relatively to each other while in engagement withthe work and while the arms are maintained by the operative in theposition determined by the abutment.

2. A tool comprising a pair of arms, a member carried by one of the armsand to which the other arm is pivoted, said member being provided withan abutment adapted to engage said other arm to limi-t the movement ofthe arms towards eachother to a position in which the working ends ofthe arms are substantially parallel, a pair of Acoacting jaws carried bythe working ends of the arms, respectively, for gripping the workbetween them as the operative grips the arms to hold the abutment andsai(- other arm engaged, the-axes of said jaws being normal to the saidworking arm ends, respeftively, and means f or rotating the jawsrelatively to each other while in engagement with tlf-w work and whilethe arms are maintained by the operative in the position determined bythe abutment.

3. VAtool comprising a pair of arms, a member carried by one of the armsand to which the other arm is pivoted, said member being provided withan abutment adapted to engage said other arm to limit the movement ofthe arms towards each other to a position in which the working ends ofthe arms are substantially parallel, a pair of coacting jaws carried bythe working ends of the arms, respectively, for gripping the workbetween them as the operative grips the arms to hold the abutment andsaid other arm engaged, one of said ja-ws being adapted to enter thework, the other one of said jaws being adapted to receive and supportthe work, and the axes of said jaws being normal to said working armends, respectively, and means for rotating the jaws relatively to eachother while in engagement with the work and while the arms aremaintained by the operative in the position determined by the abutment.

l ALBERT M. PARVIN.

